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Article Dans Une Revue EPL - Europhysics Letters Année : 2003

Flux-closure-domain states and demagnetizing energy determination in sub-micron size magnetic dots

Résumé

We used single-crystalline Fe dots self-assembled under UHV as a model system to discuss micromagnetic properties of sub-micron size magnetic dots and show what properties may or may not be scaled down from macroscopic samples. Landau and diamond states were identified by MFM and reproduced by simulations. These states are surprisingly well reproduced by the the Van den Berg model despite the small dots'size. On the contrary, it is argued theoretically that the usual determination procedure of demagnetizing factors Ni's using initial susceptibility or the over-loop area underestimate the real values of Ni's in sub-micron size dots. This point is confirmed both experimentally and in simulations.

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Dates et versions

hal-00004850 , version 1 (09-05-2005)

Identifiants

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Pierre-Olivier Jubert, Jean-Christophe Toussaint, Olivier Fruchart, Claire Meyer, Yves Samson. Flux-closure-domain states and demagnetizing energy determination in sub-micron size magnetic dots. EPL - Europhysics Letters, 2003, 63, pp.135. ⟨10.1209/epl/i2003-00488-0⟩. ⟨hal-00004850⟩
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